12-15-05
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 D.

E.
F.
G.
A
747-400
MAINTENANCE MANUAL

 (2)
Clean container with graduations - 40-ounce minimum capacityConsumable Materials

 (1)
D00509 Fluid - Hydraulic, Petroleum Base, MIL-H-6083

 NOTE: Unless you use only a small amount of fluid, approximately
____
 1.0 percent of the total, you must mix MIL-H-6083 in the
 correct proportion with Lubrizol 1395 before you fill the
 shock strut.
 You can intermix MIL-H-5606 and MIL-H-6083 or use it as an
 alternative for MIL-H-5606.
 Both MIL-H-6083 and MIL-H-5606 hydraulic fluids are optional.
 The hydraulic fluid BMS 3-32 is recommended for landing gear
 shock struts.

 (2)
D00155 Lubrizol 1395 - Shock Strut Fluid Extreme Pressure Additive

 (3)
D00070 Oil - Hydraulic, Petroleum Base, MIL-H-5606

 NOTE: Unless you use only a small amount of fluid, approximately
____
 1.0 percent of the total, you must mix MIL-H-5606 in the
 correct proportion with Lubrizol 1395 before you fill the
 shock strut.
 The MIL-H-5606 is recommended fluid over the MIL-H-6083
 fluid.
 Both MIL-H-5606 and MIL-H-6083 hydraulic fluids are optional.
 The hydraulic fluid BMS 3-32 is recommended for landing gear
 shock struts.

 (4) D00467 Fluid - Fully Formulated Hydraulic, BMS 3-32 (Recommended)
 Type I - Royco SSF, Shell SSF and Castrolaero 35 (These fluids contain the mixture of MIL-H-6083 and lubrizol 1395)
 Type II - Royco LGF, Shell LGF and Castrolaero 40 (These fluids are the recommended fluid for servicing and contain the mixture of MIL-H-5606 and Lubrizol 1395)
References
 (1)
AMM 09-11-00/201, Towing

 (2)
AMM 32-00-30/201, Landing Gear Door Locks

 (3)
AMM 32-21-02/301, Nose Landing Gear Shock Strut

 (4)
AIPC 32-21-01 Fig. 4

 (5)
AIPC 32-21-02 Fig. 1Access

 (1)  
Location Zone 715 Nose Landing Gear

Procedure (Fig. 301 and 302)
 S 863-051
 (1) Make sure the airplane is not on jacks.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A

747-400 
MAINTENANCE MANUAL 
SHUTOFF VALVE 
SEE  A 
PRESSURE 
SWITCH 
PRESSURE  SHOCK 
GAGE TUBE  STRUT 
SEE  B 
SHUTOFF VALVE 
CSEE  FWD 
AIR VALVE 
A  1 
PRESSURE 
SWITCH 
FWD 
SHOCK STRUT 
FWD 
SHOCK 
STRUT 
A 2 
OIL FILL VALVE 
PRESSURE  (CHECK VALVE) 
GAGE 

PRESSURE GAGE TUBE
FWD
AIR VALVE

B1
FWD
1 AIRPLANES WITH SHOCK STRUT PRESSURE GAGE C 2
AIRPLANES WITHOUT SHOCK STRUT PRESSURE GAGE
Nose Gear Strut Valve Locations Figure 301
K29034
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400
MAINTENANCE MANUAL

SERVICING PROCEDURE
OIL SERVICING
1.
 RELEASE THE AIR PRESSURE FULLY FROM THE SHOCK STRUT THROUGH THE AIR VALVE.

2.
 FULLY COMPRESS THE INNER CYLINDER WITH DIMENSION X AT 0.55 INCH.

3.
 WITH THE SHOCK STRUT IN THE VERTICAL POSITION, FILL THE STRUT WITH THE SPECIFIED HYDRAULIC FLUID ON THE NAMEPLATE. REMOVE THE AIR VALVE DURING THIS PROCEDURE. LET THE HYDRAULIC FLUID FLOW OUT OF THE AIR VALVE PORT. LET ALL AIR BUBBLES OUT OF THE
　
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